Neutron server stuck

Im setting two VM inside virtualbox in MAC to test the 2 node setup for openstack using this webpage https://docs.openstack.org/newton/install-guide-rdo/neutron-controller-install.html (https://docs.openstack.org/newton/ins...) as guideline.

All the steps are good except when I try to start the neutron-server.service, it is failed with logs below